Final answer:
The expression -|10b + a| evaluates to -15 when a = -1 and b = -1.4.
Step-by-step explanation:
To evaluate the expression -|10b + a| when a = -1 and b = -1.4, we substitute the values into the expression.
-|10(-1.4) + (-1)| = -|(-14) - 1| = -|-15| = -15.
Therefore, when a = -1 and b = -1.4, the expression -|10b + a| evaluates to -15.